I saw it a few years ago, it is a probable scenario, although too much violence and chaos imo. Even if/when SHTF I don't know how willing people would be to kill each other for gas.
Maybe that's because I believe in the goodness of people, I believe that some people will kill for things such as gas but most people will try to find partners and especially knowledgeable partners who know how to get things done and grow food, build shelters, or have any other professional knowledge that can help surviving when SHTF, and that's where people will get together will become less vulnerable and more independent. These communities will be mostly closed and remote once established, from fear of the outside world.
People who will try to make it on their own or with their family won't make it for the long run, unless the families will know how to work together and efficient, and not all responsibility will turn on the husband/father (unless he's exceptionally knowledgeable and trained)
That's my two cents, I could be wrong honestly... No one really knows how it'll be when SHTF, it is all predictions.
And this is one of those, short, sweet and to the point.
